The recombination of a thermalized valence band hole with a high quality two-dimensional electron gas shows clear spectral features due to electron-electron interactions in the regime of the integer quantum Hall effect. A pronounced doubletlike emission observed around odd filling factors ν0ex0ex=0ex0ex3,5 is attributed to the destructive interferences between the optically created hole in the Fermi sea and the continuous spectrum of spin wave excitations. Redshifts in the spectral position at ν~1,2 reveal the competition between the interband Coulomb binding and the electron-electron interaction in the final state in a spatially separated electron and valence hole system.
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Gravier et al. (1998) studied this question.
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